What is the cheapest airline that flies from District of Columbia to Ko Samui?

Turkish Airlines, Cathay Pacific, and Qatar Airways are the most popular carriers operating from District of Columbia to Ko Samui

When did momondo last update prices for flights from District of Columbia to Ko Samui Airport?

Prices for flights from District of Columbia to Ko Samui Airport refresh daily.

How old do you have to be to fly from District of Columbia to Ko Samui Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from District of Columbia to Ko Samui Airport.

What documentation or ID do you need to fly to Ko Samui Airport?

The travel and health documents required for your trip to Ko Samui Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ko Samui Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$653 Cheap Flights from District of Columbia to Ko Samui in 2025/26

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Find the cheapest flights from District of Columbia to Ko Samui

Round-trip

One-way

Cheap round-trip flights

9:10 pm - 9:20 amIAD-USM

24h 10m2 stops

6:30 pm - 3:30 pmUSM-IAD

33h 00m2 stops

$1,126Multiple Airlines

Find Deal

sáb., nov. 29 - dom., ene. 25

9:10 pm - 8:40 amIAD-USM

23h 30m2 stops

6:30 pm - 3:30 pmUSM-IAD

33h 00m2 stops

$1,136Multiple Airlines

Find Deal

sáb., nov. 29 - dom., ene. 25

10:05 pm - 7:35 amIAD-USM

46h 30m2 stops

9:10 pm - 4:30 pmUSM-IAD

30h 20m2 stops

$1,158Etihad Airways

Find Deal

mié., oct. 22 - mié., oct. 29

10:05 pm - 7:20 amIAD-USM

46h 15m2 stops

9:10 pm - 4:30 pmUSM-IAD

30h 20m2 stops

$1,168Etihad Airways

Find Deal

mié., oct. 22 - mié., oct. 29

1:30 pm - 11:50 amIAD-USM

34h 20m2 stops

5:40 pm - 7:20 pmUSM-IAD

37h 40m2 stops

$1,175Turkish Airlines

Find Deal

dom., nov. 23 - mié., dic. 3

9:10 pm - 9:20 amIAD-USM

24h 10m2 stops

5:25 pm - 3:30 pmUSM-IAD

34h 05m2 stops

$1,178Etihad Airways

Find Deal

sáb., nov. 29 - lun., ene. 26

9:10 pm - 8:40 amIAD-USM

23h 30m2 stops

8:50 am - 3:30 pmUSM-IAD

66h 40m2 stops

$1,199Etihad Airways

Find Deal

sáb., nov. 29 - lun., ene. 26

1:30 pm - 8:05 amIAD-USM

30h 35m2 stops

1:25 pm - 11:45 amUSM-IAD

34h 20m2 stops

$1,261Turkish Airlines

Find Deal

sáb., nov. 29 - dom., ene. 25

9:05 pm - 6:25 pmIAD-USM

34h 20m2 stops

3:35 pm - 3:55 pmUSM-IAD

36h 20m2 stops

$1,376Qatar Airways

Find Deal

jue., oct. 30 - lun., nov. 3

9:05 pm - 9:05 pmIAD-USM

37h 00m2 stops

7:10 pm - 3:55 pmUSM-IAD

32h 45m2 stops

$1,417Qatar Airways

Find Deal

jue., oct. 30 - lun., nov. 3

Turkish Airlines flights from District of Columbia to Ko Samui

Our best Turkish Airlines deals on District of Columbia to Ko Samui flight tickets

Turkish Airlines

Nov 23

IAD1:30 pmWashington, D.C. Dulles Intl

34h 20m

2 stops

USM11:50 amKo Samui

Dec 3

USM5:40 pmKo Samui

37h 40m

2 stops

IAD7:20 pmWashington, D.C. Dulles Intl

$1,175

Find similar

Turkish Airlines

Nov 29

IAD1:30 pmWashington, D.C. Dulles Intl

30h 35m

2 stops

USM8:05 amKo Samui

Jan 25

USM1:25 pmKo Samui

34h 20m

2 stops

IAD11:45 amWashington, D.C. Dulles Intl

$1,261

Find similar

Turkish Airlines

Nov 29

IAD1:30 pmWashington, D.C. Dulles Intl

30h 35m

2 stops

USM8:05 amKo Samui

Jan 30

USM1:25 pmKo Samui

58h 20m

2 stops

IAD11:45 amWashington, D.C. Dulles Intl

$1,386

Find similar

Qatar Airways flights from District of Columbia to Ko Samui

Our best Qatar Airways deals on District of Columbia to Ko Samui flight tickets

Qatar Airways

Oct 30

IAD9:05 pmWashington, D.C. Dulles Intl

34h 20m

2 stops

USM6:25 pmKo Samui

Nov 3

USM3:35 pmKo Samui

36h 20m

2 stops

IAD3:55 pmWashington, D.C. Dulles Intl

$1,376

Find similar

Qatar Airways

Oct 30

IAD9:05 pmWashington, D.C. Dulles Intl

37h 00m

2 stops

USM9:05 pmKo Samui

Nov 3

USM7:10 pmKo Samui

32h 45m

2 stops

IAD3:55 pmWashington, D.C. Dulles Intl

$1,417

Find similar

Qatar Airways

Nov 29

IAD8:05 pmWashington, D.C. Dulles Intl

29h 45m

2 stops

USM1:50 pmKo Samui

Jan 30

USM5:25 pmKo Samui

34h 30m

2 stops

IAD3:55 pmWashington, D.C. Dulles Intl

$1,534

Find similar

momondo Fare Finder

Use the filters below to find and compare flights from District of Columbia to Ko Samui that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

sáb. 11/29

9:10 pm-9:20 am

2 stops24h 10m

Ko Samui

dom. 1/25

6:30 pm-3:30 pm

2 stops33h 00m

$1,126

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

sáb. 11/29

9:10 pm-8:40 am

2 stops23h 30m

Ko Samui

dom. 1/25

6:30 pm-3:30 pm

2 stops33h 00m

$1,136

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

mié. 10/22

10:05 pm-7:35 am

2 stops46h 30m

Ko Samui

mié. 10/29

9:10 pm-4:30 pm

2 stops30h 20m

$1,158

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

mié. 10/22

10:05 pm-7:20 am

2 stops46h 15m

Ko Samui

mié. 10/29

9:10 pm-4:30 pm

2 stops30h 20m

$1,168

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

dom. 11/23

1:30 pm-11:50 am

2 stops34h 20m

Ko Samui

mié. 12/3

5:40 pm-7:20 pm

2 stops37h 40m

$1,175

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

sáb. 11/29

9:10 pm-9:20 am

2 stops24h 10m

Ko Samui

lun. 1/26

5:25 pm-3:30 pm

2 stops34h 05m

$1,178

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

sáb. 11/29

9:10 pm-8:40 am

2 stops23h 30m

Ko Samui

lun. 1/26

8:50 am-3:30 pm

2 stops66h 40m

$1,199

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

sáb. 11/29

1:30 pm-8:05 am

2 stops30h 35m

Ko Samui

dom. 1/25

1:25 pm-11:45 am

2 stops34h 20m

$1,261

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

jue. 10/30

9:05 pm-6:25 pm

2 stops34h 20m

Ko Samui

lun. 11/3

3:35 pm-3:55 pm

2 stops36h 20m

$1,376

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

jue. 10/30

9:05 pm-9:05 pm

2 stops37h 00m

Ko Samui

lun. 11/3

7:10 pm-3:55 pm

2 stops32h 45m

$1,417

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from District of Columbia to Ko Samui

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest day to depart on your flight to Ko Samui?

Our data shows that Wednesday is the least expensive day to fly to Ko Samui. Tickets to fly out on this day can be as low as $325. Flights from District of Columbia to Ko Samui on a Sunday will generally be more expensive and average around $714. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Ko Samui?

Our data shows that the cheapest District of Columbia to Ko Samui flights are usually those with departure times in the evening. Our users have found flights to Ko Samui in the evening for as low as $286. At noon is when there is more demand to fly to Ko Samui, so prices are often more expensive at around $399 per ticket.

Cheap District of Columbia to Ko Samui flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from District of Columbia to Ko Samui

Direct flights	None

There are no direct flights from District of Columbia to Ko Samui. There are no popular flight routes from District of Columbia to Ko Samui.

Search flight deals

When did momondo last update prices for flights from District of Columbia to Ko Samui Airport?
Prices for flights from District of Columbia to Ko Samui Airport refresh daily.
How old do you have to be to fly from District of Columbia to Ko Samui Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from District of Columbia to Ko Samui Airport.
What documentation or ID do you need to fly to Ko Samui Airport?
The travel and health documents required for your trip to Ko Samui Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ko Samui Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Ko Pha Ngan

Ko Tao

Khanom

Why use momondo?

Why should I use momondo to find a flight deal from District of Columbia to Ko Samui?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from District of Columbia to Ko Samui. momondo saves you time and could save you money on your trip.

Can I find flights from District of Columbia to Ko Samui with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Ko Samui from District of Columbia with this policy.

How can momondo help me find flights from District of Columbia to Ko Samui?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Ko Samui from District of Columbia.

I’m not ready to book a flight from District of Columbia to Ko Samui right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of District of Columbia to Ko Samui flights. All you need is a valid email address and we will do the rest; it is that quick and easy.